Why limit access?
it prevents potential for accidental breakages or deliberate problems. You might give your fulfiment provider access only to the Order screen or a coder access only to the theme, settings, pages and collections but not your customer list.
How to give limited access to a staff member
First go into admin/settings/account
You will see a list of all the current users (or you can add a staff member).

Then click on person's name and choose the to limit acces, and pick you want to give them.

Easy! And much safer than giving everyone access to everything.
You've got that sinking feeling. Someone had placed an order on your Shopify store for $500, and somehow the total had come down to $10. Your first thought: you've been hacked.
You haven't. What actually happened is simpler, and luckily easier to fix. You had a discount code sitting in your Shopify account called "FREE", or something equally easy to guess. Someone at checkout has just ... typed it in. And it worked.
Here's what it means and what to do.
This is a stellar example of what happens when you consistently show up and put your genuine self into your content.
Writers and journalists are always looking for authentic voices, and if you're publishing regularly, you're infinitely easier to find. Read how Chris did it.